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The Venus Transit of 2012 is considered as the rarest predictable astronomical event. It is so rare that one person can only observe it for a maximum of 2 times in his or her lifetime. It occurs when the Sun, the planet Venus, and the Earth are in perfect alignment with each other. As viewed from the Earth, Venus appears as a black dot moving across the disc of the Sun. The next Venus transit will occur on December 2117. This image was taken with a Sky-Watcher 4 in f/9 refractor, Baader 5.0 ND solar filter, Kenko NES mount, Canon 450D DSLR. Photo Credit: Anthony Urbano. For more images taken during the 2012 Venus Transit observation, click here.

This image of the Mercury Transit on November 9, 2006 was taken with a point-and-shoot camera through projection method using the 8-inch refracting telescope of the University of the Philippines National Institute for Science and Mathematics Education Development (UP NISMED) Observatory, and was featured as October 4, 2010’s Amateur Astronomy Picture of the Day (AAPOD). Photo Credit: Anthony Urbano and UP NISMED

When in opposition, the 4 bright Jovian satellites may cross the disc of its parent planet in an event called transit. The satellite (white dot) is usually followed by the shadow (black dot) it casts on Jupiter. In this photo, Io is already exiting, with its shadow still on the disc of the planet. Image taken with a Logitech 4000 web camera through prime focus imaging setup. Photo Credit: Anthony Urbano

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